/* Estilos de las páginas estáticas (landing y teoría). Mismos colores que la app (lib/app/theme.dart). */
@font-face { font-family: Fredoka; src: url(/fonts/fredoka-semibold.woff2) format('woff2'); font-weight: 600; font-display: swap; }
@font-face { font-family: Fredoka; src: url(/fonts/fredoka-bold.woff2) format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: Nunito; src: url(/fonts/nunito-regular.woff2) format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: Nunito; src: url(/fonts/nunito-bold.woff2) format('woff2'); font-weight: 700; font-display: swap; }
@font-face { font-family: Bravura; src: url(/fonts/bravura.woff2) format('woff2'); font-display: block; }

:root {
  --bg: #E6ECF2; --glow: #E3EAF7; --paper: #F8FAFC; --ink: #1E2A38; --muted: #5A6A7E;
  --accent: #2F6FDB; --accent-ink: #fff; --good: #1FA391; --gold: #E9A23B; --edge: #C9D3DE;
  --shadow: 0 1px 2px rgb(30 42 56 / 6%), 0 8px 24px rgb(30 42 56 / 8%);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131A24; --glow: #172238; --paper: #1D2633; --ink: #E4EBF3; --muted: #9AA7B9;
    --accent: #5B9BF5; --accent-ink: #0E141C; --good: #3CC7B3; --gold: #F2B65A; --edge: #2C3848;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 17px/1.6 Nunito, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background-image: radial-gradient(1200px 600px at 80% -10%, var(--glow), transparent 70%);
  background-repeat: no-repeat;
}
h1, h2, h3, .brand, .btn { font-family: Fredoka, Nunito, system-ui, sans-serif; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.3rem); line-height: 1.1; margin: 0 0 .5em; }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); line-height: 1.2; margin: 0 0 .6em; }
h3 { font-size: 1.2rem; margin: 0 0 .35em; }
p { margin: 0 0 1em; }
a { color: var(--accent); text-underline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
.wrap { width: min(1120px, 100% - 40px); margin-inline: auto; }
.narrow { width: min(760px, 100% - 40px); margin-inline: auto; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: var(--paper); padding: 8px 12px; border-radius: 8px; z-index: 10; }

/* Encabezado */
.top { position: sticky; top: 0; z-index: 5; backdrop-filter: blur(10px); background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid color-mix(in srgb, var(--edge) 60%, transparent); }
.top .wrap { display: flex; align-items: center; gap: 20px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 1.2rem; white-space: nowrap; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.top nav { display: flex; gap: 18px; margin-left: auto; align-items: center; }
.top nav a { color: var(--muted); text-decoration: none; font-weight: 700; font-size: .95rem; }
.top nav a:hover, .top nav a[aria-current] { color: var(--ink); }
@media (max-width: 860px) { .top nav .opt { display: none; } }
/* Cambio de idioma: queda visible también en el celu. */
.top nav .lang { border: 1px solid color-mix(in srgb, var(--muted) 45%, transparent); border-radius: 999px; padding: 3px 11px; font-size: .85rem; }
.top nav .lang .short { display: none; }
@media (max-width: 860px) {
  .top nav .opt.lang { display: inline-block; }
  .top nav .lang .long { display: none; }
  .top nav .lang .short { display: inline; }
}
/* En pantallas muy angostas el cambio de idioma queda solo en el pie. */
@media (max-width: 400px) { .top nav .opt.lang { display: none; } }

/* Botones */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 14px; text-decoration: none; font-size: 1.05rem; border: 2px solid transparent; transition: transform .15s, box-shadow .15s; }
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent); }
.btn.ghost { color: var(--ink); border-color: var(--edge); background: var(--paper); }
.btn.small { padding: 8px 16px; font-size: .95rem; border-radius: 11px; }
.top nav .btn.primary { color: var(--accent-ink); }

/* Landing */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: center; }
.hero .lead { font-size: 1.2rem; color: var(--muted); max-width: 34em; }
.hero .ctas { display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0 14px; }
.hero .note { font-size: .92rem; color: var(--muted); }
.shot { border-radius: 18px; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--edge); background: var(--paper); }
.shot.phone { max-width: 300px; border-radius: 28px; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; gap: 32px; } .hero { padding-top: 32px; } }

section { padding: 48px 0; }
.eyebrow { font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; margin-bottom: 8px; }
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
@media (min-width: 900px) { .grid.three { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--paper); border-radius: 18px; padding: 22px; box-shadow: var(--shadow); border: 1px solid color-mix(in srgb, var(--edge) 50%, transparent); }
.card p:last-child { margin-bottom: 0; }
.card .ico { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); font: 400 24px/1 Bravura, serif; margin-bottom: 12px; }
.card .ico.txt { font: 700 20px/1 Fredoka, sans-serif; }
a.card { color: inherit; text-decoration: none; transition: transform .15s; display: block; }
a.card:hover { transform: translateY(-2px); }
a.card .more { color: var(--accent); font-weight: 700; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.split.rev > :first-child { order: 2; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } .split.rev > :first-child { order: 0; } }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.steps li { counter-increment: s; position: relative; padding-left: 52px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 36px; height: 36px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font: 600 1.05rem Fredoka, sans-serif; }

.levels { columns: 2 260px; gap: 24px; padding-left: 1.2em; margin: 0; }
.levels li { break-inside: avoid; margin-bottom: 6px; }

details { background: var(--paper); border-radius: 14px; padding: 16px 20px; margin-bottom: 10px; border: 1px solid color-mix(in srgb, var(--edge) 50%, transparent); }
summary { cursor: pointer; font-weight: 700; }
details[open] summary { margin-bottom: 8px; }

.band { background: var(--paper); border-block: 1px solid color-mix(in srgb, var(--edge) 50%, transparent); }
.final { text-align: center; }
.final .btn { margin-top: 8px; }

footer { padding: 36px 0 48px; color: var(--muted); font-size: .95rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
footer a { color: var(--muted); }

/* Páginas de teoría */
.article { padding: 36px 0 24px; }
.crumbs { font-size: .9rem; color: var(--muted); margin-bottom: 18px; }
.crumbs a { color: var(--muted); }
.article .intro { font-size: 1.15rem; color: var(--muted); }
.article h2 { margin-top: 1.8em; }
.article ul, .article ol { padding-left: 1.3em; }
.article li { margin-bottom: .3em; }
.cta-box { margin: 36px 0; padding: 24px; border-radius: 18px; background: color-mix(in srgb, var(--accent) 10%, var(--paper)); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); display: flex; gap: 18px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.cta-box p { margin: 0; font-weight: 700; }
.toc { background: var(--paper); border-radius: 14px; padding: 14px 20px; margin: 20px 0; }
.toc ol { margin: 6px 0 0; }

figure { margin: 18px 0; }
figcaption { font-size: .9rem; color: var(--muted); margin-top: 6px; }
.examples { display: flex; flex-wrap: wrap; gap: 14px; }
.examples figure { margin: 0; background: var(--paper); border-radius: 14px; padding: 12px 14px 8px; border: 1px solid color-mix(in srgb, var(--edge) 50%, transparent); }
.examples figcaption { text-align: center; line-height: 1.35; font-weight: 700; color: var(--ink); }

svg.staff { display: block; height: auto; max-width: 100%; overflow: visible; }
svg.staff .line, svg.staff .ledger { stroke: var(--ink); stroke-width: 1.1; }
svg.staff .g { font: 40px/1 Bravura; fill: var(--ink); }
svg.staff .name { font: 700 13px Nunito, sans-serif; fill: var(--muted); }
svg.circle5 { width: min(360px, 100%); height: auto; display: block; margin: 0 auto; }
svg.circle5 .ring { fill: var(--paper); stroke: var(--edge); stroke-width: 1.5; }
svg.circle5 .inner { fill: color-mix(in srgb, var(--accent) 8%, var(--paper)); }
svg.circle5 .core { fill: var(--bg); }
svg.circle5 .spoke { stroke: var(--edge); stroke-width: 1.2; }
svg.circle5 .major { font: 600 17px Fredoka, sans-serif; fill: var(--ink); }
svg.circle5 .minor { font: 700 13px Nunito, sans-serif; fill: var(--muted); }
svg.circle5 .acc { font: 700 10px Nunito, sans-serif; fill: var(--accent); }
svg.circle5 .center { font: 600 13px Fredoka, sans-serif; fill: var(--muted); }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; background: var(--paper); border-radius: 14px; overflow: hidden; font-size: .97rem; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid color-mix(in srgb, var(--edge) 60%, transparent); vertical-align: middle; }
th { font-family: Fredoka, sans-serif; font-weight: 600; background: color-mix(in srgb, var(--accent) 8%, var(--paper)); }
tr:last-child td { border-bottom: 0; }
.smufl { font: 36px/1 Bravura; display: inline-block; min-width: 1.2em; padding: 12px 0 0; }
.article > article > figure:has(svg.staff) { background: var(--paper); border-radius: 14px; padding: 14px 18px 10px; border: 1px solid color-mix(in srgb, var(--edge) 50%, transparent); }
.byline { font-size: .9rem; margin-top: 28px; }
.related { padding: 24px 0 40px; }
.related h2 { margin-top: 0; }
.related .grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.article h3 { margin-top: 1.6em; }
.table-wrap { margin: 0 0 1em; }